My boyfriend has been taking losartan potassium for about a week and has been feeling heaviness in his legs. is this a normal side effect? should he be concerned? he has a follow up with his doctor on wed?

Losartan heavy legs: I have been prescribing it as long as it has been around and never heard of heavy legs. Discuss with team. Can wait till Wednesday.

Multple possbilities: Heavy legs can result from low blood pressure, a valve problem, heart failure, anemia, swelling of the legs and other conditions. A check of ones blood pressure, sitting and standing, can clarify the blood pressure issue; a simple blood test can eliminate anemia; a physical exam can determine the presence or absence of heart failure, leg edema and a valve problem. See a doctor.